Carbureter.



J. KERNS. CARBURETER. APPLICATION FILED JULY 21.1911.

WITNESSES IN V EN TOR,

Patented Dec. 17, 1918.

UNITED STATES PATENT curios.

JAMES KERNS, 0F KALAMAZOO, MICHIGAN, ASSIGNOR T0 WILLIAM S. DEWING, OF KALAMAZOO, MICHIGAN.

CARBUBETEE.

Specification of Letters Patent.

Patented Dec. 17, 1918.

To all whom it may concern Be it known that 1, JAMES KnRNs, a citizen of the United States, residing in the city and county of Kalamazoo and State of Michigan, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

This invention relates to improvements in carbureters.

The main objects of this invention are:

First, to provide an improved carbureter which secures a very eflicient mixing of the air and fuel.

Second, to provide an improved carbureter in which the relative proportions of air and fuel are maintained throughout varying running conditions such as variations iii load and speed.

Third, to provide an improved carbureter having a combined manual and automatic control.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a partof this specification, in which:

Figure I is a side elevation of a structure embodying the features of my invention.

Fig. IT is a plan view thereof.

Fig. III is a. central longitudinal section on a line corresponding to line 33 of Fig. 11, parts being shown in full lines for convenience in illustration.

Fig. IV is an end view looking from the right of Figs. 1-, II and III, the throttle valve stem being broken away and other parts omitted;

Fig. V is a detail section'on a line corresponding to line 5-5 of Fig. 111.

In the drawing, similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing. the body 1 of my improved carbureter is preferably a cast.- ing and is chambered to provide a mixing chamber 2. A fuel passage member 3 is disposed transversely of the body member through the chamber thereof and is provided with a fuel passage 4. The passage member is extended to provide a nipple 5 to which the fuel supply pipe is connected. The carbureting chamber member 6 is disposed in the outer end of the body member '1 and provided with a central tubular carbureting chamber 7 which is arranged through an opening 8 in the fuel passage member 3 so as to discharge into the mixing chamber. I

The carbureting chamber member has an inwardly facing valve seat 9 for the suction actuated mixing chamber inlet valve 10 which has a sleeve or hub 11 slidably mounted upon the carbureting chamber 7. The coiled spring 12 holds this mixing chamber valve 9 normally against its seat, the tension of the spring. however, being such that the valve is opened when the suction reaches a predetermined degree.

The carbureting chamber 7 is provided with a port 13 registering with the passage 4::- A fuel regulating valve 14.- seats in the inner end of the passage 4 controlling the delivery of the fuel therethrough. This valve reciprocates in a bushing 15 disposed in a bore 16 in the upper end of the passage member 3. The carbureting chamber 7 has a hole 17 therein alined with the port 13 so that the fuel valve extends transversely through the carbureting chamber, as shown in Fig. III.

At the outer end of the carbureting chamber member is a carbureting chamber valve casing 18 having a valve seat 19 with the ports 20 therein at its outer end. The valve 21 seats outwardlyagainst this valve seat. The valve casing 18 is cylindrical and has a-portion 22 in which the valve is a sliding fit, so that the passage of air is prevented until the valve passes from this reduced portion. 1

The throttle 23 is arranged at the rear of the mixing chamber and is provided with a stem 24 having an actuating arm 25. The

end of this throttle stem has threaded en'- gagement' with the" control lever 2.6. fuel'valve 14: is threaded into this control The lever for adjustment. The opposite end of the control lever rests upon the bell crank CIT actuating lever 27 which is pivoted at 28 on a bracket '29 on the carbure'ting chamber member 6 and is connected by the link 30 to an arm 31 on the stem'32 of the carbureting chamber valve. This stem is disposed through the valve seat member and through the outer end of a housing 33 carried by the valve casing. The lever 27 is disposed through a slot 3% in the housing 35 carried by the carbureting chamber member.

The controllever is urged to its initial position by means of the coiled spring 36 which is supported upon apin 37 pro ecting through the lever and having a head at its outer end, the spring being arranged between the head and the lever.

A stop 38 is arranged through the control lever and threaded into the body 1 for adjustment. The holes in the lever for the valve stem, valve pin, and stop are of such size as to permit the tilting of the lever. When the throttle is opened and closed the control lever is, through the threaded engagement with the throttle valve stem, raised and lowered, thus raising and lowering the fuel valve. When the carbureting chamber inlet valve is opened by the suction of the engine the control lever is actuated through the connections described to open the fuel valve. The spring 36 is of such tension that the carbureting chamber valve is opened prior to the opening of the mixing chamber valve.

By arranging the carbureting chamber valve so that the fuel valve is opened on to the admitting of air to the carbureting chamber valve fuel is taken up with the first inr-ush of air through the carbureting inlet chamber, thus facilitating the starting of the engine. By this arrangement and control of the. fuel valve no float chamber is necessary.

l have illustrated and described my improvements in an embodiment Which I have found very satisfactory in operation. I have not attempted to illustrate or describe various modifications in structural details which i contemplate as I believe the disclosure made will enable those skilled in the art to which my invention relates to em body or adapt the same as may be desired.

Having thus described my invention, What claim as new and desire to secure by Lettiers Patent is:

l. in a carburetor, the combination of a body member" having a mixing chamber therein and a transversely disposed fuel passage member provided With a fuel pas-- sage, a carbureting chamber member disposed in said body member and having a central tubular carbureting chamber disposed through said fuel passage member and provided With a port registering With the fuel passage thereof, said carbureting chamber member being provided with a naeaeac mixing chamber inlet valve seat and a carbureting chamber inlet valve casing having an inlet valve seat at its outer end, a suction actuated mixing chamber valve, a suction actuated carbureting chamber valve, a control lever, an actuating lever for said control lever operatively connected with said carbureting chamber valve, a throttle valve provided with a stem having threaded engagement with said control lever whereby said lever is adjusted by the adjustment of the throttle, a fuel valve having threaded connection with said lever, a return spring for said control lever, a return spring for said mixing chamber inlet valve of greater tension than said control lever return spring, and an adjustable stop for said control lever.

2. In a carburetor, the combination of a body member having a mixing chamber therein and a transversely disposed fuel passage member provided with a fuel passage, a carbureting chamber member disposed in said. body member and having a central tubular carbureting chamber disposed through said fuel passage member and provided with a port registering With the fuel passage thereof, said carbureting chamber member being provided with a mixing chamber inlet valve seat carbureting chamber inlet valve casing having an inlet valve seat at its outer end, a suction actuated mixing chamber valve, a suction actuated carbureting chamber valve, a control lever, an actuating lever for said control lever operatively connected with said carbureting chamber valve, and a throttle valve provided with a stem havingthreaded engagement with said control lever whereby said lever is adjusted by the adjustment of the throttle, a fuel valve having threaded connection with said lever.

3. in a carbureter, the combination of a body member having a mixing chamber therein and a transversely disposed fuel passage member provided with a fuel passage, a carbureting chamber member disposed in said body member and having a central tubular carburet-ing chamber disposed through said fuel passage member and provided with a port registering with the fuel passage thereof, said carbureting chamber member being provided with a mixing chamber inlet valve seat and a carbureting chamber inlet. valve casing having an inlet valve seat at its outer end, a suction actuated mixing chamber valve, a suction actuated carburetingchamber valve, a control lever, anactuating lever for said control le- Yer operatively connected with said carbureting chamber valve, a .throttle valvehavingoperative connection with said con trol lever whereby said lever is adjusted by the adjustment of the throttle, a fuel valve having connection with said lever, a return spring for said mixing chamber inlet valve of greater tension than said control lever return spring, and an adjustable stop for said control lever.

at. In acarbureter, the combination of a b dv member having a mixing chamber therein and a transversely disposedfuel passage member provided with a fuel passage, a carbureting chamber member disposed in said body member and-having a central tubular carbureting chamber disposed through said fuel passage member and provided with a port registering with the fuel passage thereof, said carbureting chamber member being provided with a mixing chamber inlet valve seat and a carbureting chamber inlet valve casing having an inlet valve seat at its outer end, a suction actuated mixing chamber valve, a suction actuated carbureting chamber valve, a control lever, an actuating lever for said control lever operatively connected with said carbureting chamber valve, :1 throttle having operative connection with said control lever whereby said lever is adjusted by the adjustment ofithe throttle,

and a fuel valve having operative connec-' tion with said lever.

In a carbureter, the combination of a mixing chamber, a carbureting chamber delivering to said mixing chamber, a suct on actuated mixing chamber valve, a suctlon actuated carbureting chamber valve, a control lever, an actuating lever for said control lever operatively connected with said carbureting chamber valve, a throttle valve provided with a stem having threaded engagement with said control lever whereby said lever is adjusted by the adjustment of the throttle, a fuel valve having threaded connection with said lever, a return spring for said control lever, a return spring for said mixing chamber inlet valve of greater tension than said control lever return spring, and' an adjustable stop for said control lever.

6. In a carbureter, the combination of a mixing chamber, a carbureting chamber delivering to said mixing chamber, a suct on actuated mixing chamber valve, a. suctlon actuated carbureting chamber valve, a control lever, an actuating lever for said control lever operatively connected with said carbureting chamber valve, :1 throttle valve provided with a stem having threaded engagement with said control lever whereby said lever is adjusted by the adjustment of the throttle, and a fuel valve having threaded connection with said lever.

7. In a carbureter, the combination of a mixing chamber, a carbureting chamber delivering to said mixing chamber, a suction actuated mixing chamber valve, a suction actuated carbureting chamber valve, a control lever. an actuating lever for said control lever operatively connected with said carbureting chamber valve, a throttle valve operatively connected with said control lever whereby said lever is adjusted by the adjustment of the throttle, a fuel valve'having operative connection with said lever, a return spring for said control lever, a return spring for said mixing chamber inlet valve of greater tension thansaid control lever return spring, and an adjustable stop for said control lever.

8. In a carbureter, the combination of a mixing chamber, a carbureting chamber dclivering to said mixing chamber, a suction actuated mixing chamber valve, a suction actuated carbureting chamber valve, a control lever, an actuating lever for said control lever operatively connected with said carbureting chamber valve, athrottle valve having operative connection with said control lever whereby said lever is adjusted by the adjustment of the throttle, and a fuel valve having operative connection with said control lever.

9. In a carbureter, the combination of a mixing chamber, a carbureting chamber delivering to said mixing chamber, a suction actuate-d mixing chamber valve, a suction actuated carbureting chamber valve, a control lever, an actuating lever for said control lever operatively connected with said carbureting chamber valve, a throttle valve having operative connection with said control lever wherebysaid lever is adjusted by the adjustment of the throttle, and a fuel valve having operative connection with said lever, said carbureting chamber valve being operatively connected to the control lever'so that the fuel valve is opened upon the open ing of said carbureting chamber valve.

10. In a carbureter, the combination of a suction actuated member, a throttle valve, a fuel valve, a control lever with which said fuel valve has adjustable connection, a stem for said throttle valve having operative connection with one end of said control lever, an actuating lever coacting with the other end of said control lever and having operating connections with said suction actuating member, and an adjustable stop coacting with the end of said control lever acted upon by said actuating lever.

11. In a carbureter, the combination of a suction actuated member, a throttle valve, :1 fuel valve, a control lever withwhich said fuel valve has adjustable connection. a stem for said throttle valve having operative connection with one end of said control lever, and an actuating lever coacting with the other end of said control lever and having operative connections with said suction actuated member.

12. In a carbureter, the combination of a suction actuated member, a throttle valve, a control lever. said throttle valve being provided. with a stem having threaded engage- 1. memes ment with said control lever so that said my hand and seal in the presence of two lever is adjusted by the adjustment of the Witnesses.

throttle, operating connections for said suc- T tion actuated member to said control lever JAMES KER} e and a fuel valve having adjustable conneclVltnessesz I tion with said control lever. LUELLA Gr. GREENFIELD,

In Witness whereof I have hereunto set GRACE B. THOMPSON. 

